Pittsburgh has more briges than any other city in the United States—446 in total, and some claim it has the most in the world. However, Hamburg, Germany is also stated to have the most bridges of any city in the world. What constitutes a true bridge (length, etc) is part of what causes this discrepancy. . The city's proximity to three major rivers and countless hills and ravines has led to its becoming known as the City of Bridges.